Hertfordshire Bird Atlas Abundance Map

Grey Heron

Ardea cinerea

SP81W - Buckland ()

SP81S - Draytonmead Farm ()

SP81X - Long Marston (0.25)

SP81T - Thistlebrook Farm (0.25)

SP81Y - Alnwick Farm (0.25)

SP81Z - Crafton ()

SP90V - Meadhams Farm ()

SP90W - Orchard Leigh ()

SP90X - Whelpley Hill Farm ()

SP90I - Cholesbury ()

SP90N - Hawridge Common ()

SP90T - Hockeridge Wood ()

SP90Y - Berkhamsted S ()

SP90E - Spencersgreen ()

SP90J - Hastoe ()

SP90P - Champneys ()

SP90U - Northchurch (0.25)

SP90Z - Berkhamsted N ()

SP91A - Tring W (0.50)

SP91F - Tring E ()

SP91K - New Ground ()

SP91Q - Norcott Hill ()

SP91V - Berkhamsted Common ()

SP91B - Little Tring (8.00)

SP91G - New Mill (0.25)

SP91L - Aldbury Nowers ()

SP91R - Aldbury (0.25)

SP91W - Little Gaddesden ()

SP91C - Wilstone (0.25)

SP91H - College Lake (0.75)

SP91M - Pitstone Hill (0.25)

SP91X - Ringshall ()

SP91D - West End Farm ()

SP91E - Mentmore ()

TL00A - Flaunden ()

TL00F - Belsize ()

TL00K - Chipperfield ()

TL00Q - Berrybushes Wood ()

TL00V - Abbots Langley ()

TL00B - Bovingdon ()

TL00G - Bulstrode ()

TL00L - Whippendell Bottom ()

TL00R - Kings Langley (0.25)

TL00W - Bedmond ()

TL00C - Bovingdon Airfield ()

TL00H - Westbrook Hay (0.25)

TL00M - Apsley (2.00)

TL00S - Nash Mills (0.25)

TL00X - Pimlico ()

TL00D - Broadway Farm (0.25)

TL00I - Chaulden (0.50)

TL00N - Hemel Hempstead (0.50)

TL00T - Adeyfield ()

TL00Y - Leverstock Green ()

TL00E - Potten End (0.25)

TL00J - Boxted Farm ()

TL00P - Gadebridge (1.50)

TL00U - Grovehill ()

TL00Z - Buncefield ()

TL01A - Nettleden ()

TL01F - Great Gaddesden (0.50)

TL01K - Briden's Camp (0.25)

TL01Q - Easbrookhay Farm ()

TL01V - The Aubreys ()

TL01B - Hudnall ()

TL01G - Widmore Farm ()

TL01L - Gaddesden Row (0.25)

TL01R - Puddephat's Farm (0.25)

TL01W - Rabbitfield Spring ()

TL01C - Studhamhall Farm ()

TL01H - Clement's End ()

TL01M - Beechwood House ()

TL01S - Flamstead ()

TL01X - Friar's Wash (0.25)

TL01I - Dedmansey Wood ()

TL01N - Markyate W ()

TL01T - Markyate E (0.25)

TL01Y - Pepsal End ()

TL01P - Kensworth Lynch ()

TL01U - Caddington ()

TL01Z - Slip End ()

TL02Y - Galley Hill ()

TL02Z - Barton Hill Farm ()

TL03V - Barton-le-Clay (0.25)

TL10A - Kingswood ()

TL10F - Bricket Wood Common (0.25)

TL10K - Netherwylde Farm (0.25)

TL10Q - Harperbury ()

TL10V - Shenley ()

TL10B - M25 Junction 21 ()

TL10G - Blackgreen Wood ()

TL10L - Frogmore (0.50)

TL10R - Broad Colney ()

TL10W - Salisbury Hall (0.25)

TL10C - Potters Crouch ()

TL10H - Chiswell Green ()

TL10M - St Julians (0.75)

TL10S - London Colney N ()

TL10X - Tyttenhanger (1.75)

TL10D - Gorhambury ()

TL10I - Praewood Farm (0.75)

TL10N - St Albans (0.50)

TL10T - Fleetville ()

TL10Y - Smallford (0.50)

TL10E - Hogg End ()

TL10J - Batchwood Hall ()

TL10P - New Greens and Townsend ()

TL10U - Marshalswick ()

TL10Z - Beech Farm (1.50)

TL11A - Beaumont Hall (1.25)

TL11F - Hedge's Farm (0.50)

TL11K - Cheapside Farm ()

TL11Q - Sandridge ()

TL11V - Symonshyde Great Wood ()

TL11B - Harpendenbury (0.50)

TL11G - Hatching Green ()

TL11L - Harpenden SE ()

TL11R - Nomansland ()

TL11W - Coleman Green (0.25)

TL11C - Faulkners End Farm ()

TL11H - Harpenden NW ()

TL11M - Batford ()

TL11S - Marshalls Heath ()

TL11X - Bride Hall (1.25)

TL11D - West Hyde (0.25)

TL11I - East Hyde ()

TL11N - Bower Heath ()

TL11T - Blackmore End ()

TL11Y - Ayot St Lawrence ()

TL11J - Chiltern Green (0.25)

TL11P - Ansells End ()

TL11U - Kimpton ()

TL11Z - Kimpton Mill ()

TL12F - Luton Airport ()

TL12K - Diamond End (0.25)

TL12Q - Bendish ()

TL12V - Whitwell ()

TL12B - Stopsley ()

TL12G - Tea Green ()

TL12L - The Heath ()

TL12R - Kingswalden Park ()

TL12W - Hitch Wood ()

TL12C - Butterfield Green ()

TL12H - Lilley Bottom ()

TL12M - Ley Green ()

TL12S - Preston ()

TL12X - Poynders End ()

TL12D - Lilley (0.25)

TL12I - The Flints ()

TL12N - Great Offley ()

TL12T - Offleyholes Farm ()

TL12Y - Gosmore ()

TL12E - Telegraph Hill ()

TL12J - Little Offley ()

TL12P - Gravehill Plantation ()

TL12U - Hitchin SW (0.25)

TL12Z - Hitchin Hill ()

TL13A - Hexton ()

TL13F - Tingley Wood ()

TL13K - Pirton ()

TL13Q - Oughtonhead Common ()

TL13V - Ickleford ()

TL13B - Higham Gobion ()

TL13G - Apsley End ()

TL13L - Burge End ()

TL13R - Holwell ()

TL13W - Ickleford Common ()

TL13S - Holwellbury (0.25)

TL13X - Arlesey (0.50)

TL20A - Ridge ()

TL20F - South Mimms ()

TL20K - Potters Bar ()

TL20Q - Five Acre Wood (0.25)

TL20V - Barvin Park (0.25)

TL20B - Redwell Wood Farm (0.50)

TL20G - Royal Veterinary College (0.25)

TL20L - Swanley Bar (0.25)

TL20R - Queenswood ()

TL20W - Northaw ()

TL20C - North Mymms Park ()

TL20H - Welham Green (0.50)

TL20M - Bell Bar (0.25)

TL20S - Kentish Lane Farm (1.00)

TL20X - Great Wood County Park ()

TL20D - Roehyde (0.25)

TL20I - South Hatfield ()

TL20N - Woodside ()

TL20T - Wildhill (0.50)

TL20Y - Little Berkhamsted ()

TL20E - Hatfield Aerodrome (0.75)

TL20J - Birchwood (0.25)

TL20P - Home Park (1.00)

TL20U - Essendon (0.75)

TL20Z - Howe Green (0.75)

TL21A - Cromerhyde Farm (0.50)

TL21F - Stanborough (0.75)

TL21K - Hatfield Hyde ()

TL21Q - Holwell Court Farm (0.50)

TL21V - Letty Green ()

TL21B - Brocket Park (0.25)

TL21G - Sherrardspark (0.50)

TL21L - Peartree ()

TL21R - Panshanger Aerodrome ()

TL21W - Panshanger Stables (1.50)

TL21C - Ayot St Peter ()

TL21H - Digswell Park ()

TL21M - Digswell (0.75)

TL21S - Tewin ()

TL21X - Bramfield ()

TL21D - Pulmer Water (0.75)

TL21I - Welwyn (0.25)

TL21N - Harmergreen Wood ()

TL21T - Bull's Green ()

TL21Y - Bramfield Woods ()

TL21E - Codicote ()

TL21J - Tagmore Green ()

TL21P - Woolmer Green ()

TL21U - Datchworth (0.50)

TL21Z - Watkin's Hall Farm (0.25)

TL22A - Rusling End (0.33)

TL22F - Old Knebworth (0.50)

TL22K - Knebworth ()

TL22Q - Bragbury End (0.50)

TL22V - Frogmore Hall (0.50)

TL22B - Langley Bottom (0.50)

TL22G - Norton Green (0.50)

TL22L - Broadwater ()

TL22R - Aston ()

TL22W - Benington Lordship ()

TL22C - Almshoe Bury ()

TL22H - Stevenage Old Town ()

TL22M - Pin Green ()

TL22S - Chells Manor ()

TL22X - Walkern Lodge ()

TL22D - Titmore Green ()

TL22I - Lister Hospital ()

TL22N - Chesfield Park ()

TL22T - Boxbury Farm ()

TL22Y - Walkern (0.50)

TL22E - Great Wymondley (0.25)

TL22J - Rowley Court ()

TL22P - Damask Green ()

TL22U - Hall's Green (1.00)

TL22Z - Cromer ()

TL23A - Letchworth Hall Hotel ()

TL23F - Willian ()

TL23K - Lannock Manor ()

TL23Q - Weston ()

TL23V - Kingswoodbury ()

TL23B - Letchworth West (0.33)

TL23G - Letchworth East ()

TL23L - Baldock ()

TL23R - Bird Hill ()

TL23W - Wallington ()

TL23C - Letchworth Sewage Works (0.67)

TL23H - Norton and Radwell (1.33)

TL23M - Bygrave Common ()

TL23S - The Firs ()

TL23X - Bygrave Lodge Farm ()

TL23I - A1(M) Junction 10 (0.50)

TL23N - Newnham ()

TL23T - Bygrave ()

TL23Y - Slip End ()

TL23J - Caldecote ()

TL23P - Newnham Hill ()

TL23U - Ashwell ()

TL23Z - Ashwell and Morden Station ()

TL24F - Hinxworth ()

TL24K - Ashwell End ()

TL24Q - Cold Harbour ()

TL24V - Gatley ()

TL24L - Dunton Lodge Farm ()

TL24R - Guilden Morden S ()

TL24S - Guilden Morden N (0.25)

TL30A - Cattlegate Farm ()

TL30F - Theobalds Manor (0.25)

TL30K - Theobalds Park ()

TL30Q - Bowyers Water (3.00)

TL30B - Cuffley ()

TL30G - Goff's Oak (0.25)

TL30L - Flamstead End (0.25)

TL30R - Seventy Acres Lake (0.75)

TL30C - Newgate Street ()

TL30H - Hammond Street (0.25)

TL30M - Wormleybury (0.50)

TL30S - Turnford (1.50)

TL30D - Blackfan Wood ()

TL30I - Cowheath Wood ()

TL30N - Carneles Green ()

TL30T - Broxbourne ()

TL30Y - Nazeing Mead (0.25)

TL30E - Bayford (0.33)

TL30J - Monks Green ()

TL30P - Goose Green ()

TL30U - Hoddesdon ()

TL30Z - Rye House Station (4.25)

TL31A - Bayfordbury ()

TL31F - Brickendonbury ()

TL31K - Hertford Heath ()

TL31Q - St Margarets ()

TL31V - Stanstead Abbotts (0.50)

TL31B - Hertford North Station (0.25)

TL31G - Hertford ()

TL31L - Rush Green (1.75)

TL31R - Great Amwell (4.00)

TL31W - Little Briggens ()

TL31C - Waterford (0.25)

TL31H - Ware Park Farm (0.75)

TL31M - Ware (0.25)

TL31S - Great Cozens ()

TL31X - Wareside (0.50)

TL31D - Stapleford (0.25)

TL31I - Tonwell (0.25)

TL31N - Wadesmill ()

TL31T - Fabdens (0.25)

TL31Y - Bakers End ()

TL31E - Watton at Stone (1.50)

TL31J - Sacombe (0.25)

TL31P - Sacombe Green (0.25)

TL31U - High Cross ()

TL31Z - Barwick (0.25)

TL32A - Whempstead ()

TL32F - Dane End ()

TL32K - Potter's Green ()

TL32Q - Colliers End ()

TL32V - Latchford (1.25)

TL32B - Burn's Green ()

TL32G - Haultwick ()

TL32L - Levens Green ()

TL32R - Old Hall Green (0.25)

TL32W - Standon (0.25)

TL32C - Clay End ()

TL32H - Wood End ()

TL32M - Great Munden ()

TL32S - Hamels Park ()

TL32X - Braughing ()

TL32D - Ardeley ()

TL32I - Moor Green ()

TL32N - Whatbarn Farm ()

TL32T - Westmill (0.75)

TL32Y - Dassels (0.25)

TL32E - Bancroft Farm ()

TL32J - Cottered ()

TL32P - Aspenden Hall ()

TL32U - Buntingford ()

TL32Z - Hare Street ()

TL33A - Rushden ()

TL33F - Broadfield Hall ()

TL33K - Little Butter Hill ()

TL33Q - Wyddial ()

TL33V - Silkmead Farm ()

TL33B - Roe Green ()

TL33G - Green End (0.25)

TL33L - Buckland Bottom (0.50)

TL33R - Capons Wood ()

TL33W - Cave Gate ()

TL33C - Wheat Hill ()

TL33H - Philpott's Wood ()

TL33M - The Homestead ()

TL33S - Strawberry Grove ()

TL33X - Barkway (0.50)

TL33D - Crouch Hill ()

TL33I - Kelshall (0.50)

TL33N - Reed End ()

TL33T - Reed ()

TL33Y - Newsells ()

TL33E - Lower Coombe Farm ()

TL33J - Church Hill ()

TL33P - Mile End Farm ()

TL33U - Whiteley Hill ()

TL33Z - Barley ()

TL34F - Highfield Farm ()

TL34K - Royston W ()

TL34Q - Royston E (0.50)

TL34V - Noon's Folly Farm ()

TL34L - Beauval Farm (0.50)

TL34R - Holland Hall ()

TL41A - Briggens Park ()

TL41F - Eastwick ()

TL41K - Harlow Town Station ()

TL41B - Hunsdonbury (0.75)

TL41G - Eastwick Hall Farm ()

TL41L - Gilston Park (0.50)

TL41R - Rowney Farm ()

TL41W - Durrington Hall (0.25)

TL41C - Hunsdon ()

TL41H - Hunsdon Lodge Farm ()

TL41M - Stonards (0.25)

TL41S - High Wych ()

TL41X - Sawbridgeworth ()

TL41D - Little Blakesware ()

TL41I - Perry Green ()

TL41N - Allen's Green ()

TL41T - Trims Green ()

TL41Y - Spellbrook ()

TL41E - Kettle Green ()

TL41J - Much Hadham ()

TL41P - Green Tye (0.25)

TL41U - Thorley ()

TL41Z - Thorley Street (0.50)

TL42A - Bromley ()

TL42F - Hadham Ford ()

TL42K - Bury Green ()

TL42Q - Stortford Park ()

TL42V - Bishop's Stortford ()

TL42B - Wellpond Green ()

TL42G - Albury End (0.25)

TL42L - Hadham Hall (0.25)

TL42R - Wickham Hall ()

TL42W - Foxdells Farm ()

TL42C - Braughing Friars ()

TL42H - Albury (2.50)

TL42M - Clapgate ()

TL42S - Farnham ()

TL42X - Hazel End ()

TL42D - Bozen Green ()

TL42I - Furneux Pelham (0.25)

TL42N - Hixham Hall ()

TL42T - Mallows Green ()

TL42E - Little Hormead ()

TL42J - Whitebarns ()

TL42P - Stocking Pelham (0.25)

TL43A - Brick House Farm ()

TL43F - Brent Pelham ()

TL43K - Starling's Green ()

TL43B - Anstey ()

TL43G - Meesden (0.25)

TL43L - Further Ford End ()

TL43C - Nuthampstead ()

TL43H - Langley Lawn ()

TL43D - Abbotsbury Farm ()

TL43I - Chrishall Common ()

TL43E - Chishall Windmill (0.25)

TL44A - Clay Hill ()

TL51C - Gladwyns ()

TL52A - Start Hill ()

TL52F - Tilekiln Green ()

TL52B - Birchanger ()

TL52C - Stansted Mountfitchet ()

TQ09A - Chalfont St Peter ()

TQ09F - West Hyde ()

TQ09K - Harefield ()

TQ09Q - Battlers Wells Farm ()

TQ09V - Northwood ()

TQ09B - Chalfont Common ()

TQ09G - Maple Cross (0.75)

TQ09L - Stocker's Lake (4.25)

TQ09R - Batchworth Heath ()

TQ09W - Moor Park ()

TQ09C - Chorleywood West ()

TQ09H - Chorleywood Bottom (0.25)

TQ09M - Rickmansworth ()

TQ09S - Croxley Green (1.00)

TQ09X - Holywell (2.50)

TQ09I - Chorleywood Common ()

TQ09N - Loudwater (0.25)

TQ09T - Whippendell Wood ()

TQ09Y - Cassiobury Park (0.75)

TQ09E - Chenies (1.00)

TQ09J - Sarratt Bottom (0.50)

TQ09P - Sarratt ()

TQ09U - Chandler's Cross ()

TQ09Z - Leavesden Green (0.50)

TQ19A - Pinnerwood Park (0.25)

TQ19B - Oxhey Wood (1.00)

TQ19G - Carpenders Park (0.25)

TQ19L - Bentley Priory (0.25)

TQ19C - Oxhey (0.25)

TQ19H - Bushey (0.25)

TQ19M - Bushey Heath ()

TQ19S - Aldenham Reservoir (1.00)

TQ19X - Edgewarebury (0.25)

TQ19D - Watford (0.50)

TQ19I - Bushey Hall ()

TQ19N - Letchmore Heath (0.50)

TQ19T - Aldenham Park (1.00)

TQ19Y - Borehamwood ()

TQ19E - North Watford (0.25)

TQ19J - M1 Junction 5 (0.50)

TQ19P - Batlers Green (0.25)

TQ19U - Radlett ()

TQ19Z - Kitwells Farm (0.50)

TQ29C - Sterling Corner ()

TQ29D - Rowley Green (0.50)

TQ29I - Galley Lane Farm ()

TQ29N - High Barnet ()

TQ29E - Buckettsland Farm ()

TQ29J - Dancers Hill ()

TQ29P - Wrotham Park ()

TQ29U - Hadley Wood ()

TQ39U - Enfield Lock ()

Major towns Important bird sites 10km Square IDs

Mean hourly count

0 - <0.25

0.25 - <0.33

0.33 - <0.50

0.50 - <0.75

0.75 or more

This map shows the relative abundance data from TTVs, plotted as mean hourly counts.

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1967-73 Breeding Atlas

1981-84 Winter Atlas

1988-92 Breeding Atlas

2007-12 Winter Atlas

2008-12 Breeding Atlas

1967 vs 1998 Change

1998 vs 2008 Change

2007-12 Winter Abundance

2008-12 Breeding Abundance

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